jon lapook examines the study and what it means. mandy clark one on one with the top u.s. commander in afghanistan on the future of the war and the decision to begin pulling out. the man accused of the worst war crimes in europe since the nazis shows nothing but contempt for justice. mark phillips has the pictures from the court. and on this fourth of july as the space shuttle program nears an end, jim axelrod asks "what happened to the flags on the moon?" >> it's beautiful. >> pelley: do those star spangled banners yet wave? captioning sponsored by cbs this is the "cbs evening news" with scott pelley. >> pelley: good evening, chantix is the most popular anti-smoking drug on the market with annual sales of nearly $800 million. but a study out today raises new safety questions about it. chantix has already been linked to an increased risk of suicidal thoughts and now to a higher risk of heart disease. we asked dr. jon lapook to tell us what we need to know about these new findings. >> reporter: today's study is worrisome news for the more than seven million americans who ha